The metadata below describe the original scanning. Follow the "All Files: HTTP" link in the "View the book" box to the left to find XML files that contain more metadata about the original images and the derived formats (OCR results, PDF etc.). See also the What is the directory structure for the texts? FAQ for information about file content and naming conventions.
"To each chapter has been appended a short list of sources in English ... and of suggestions for parallel reading."--Pref
To the original work, which ends with Theodosius I, the period from that time to the time of Charlemagne has been added by the editor (p. 421-486) cf. Pref